Problems with built-in Battery Saver

Hey, guys
When I first updated to Kit Kat, about a month ago, my battery saving option stopped working, I kept turning it on but it turned itself off everytime I close the battey settings, so I contacted moto care and the attendant told me to factory reset the phone and so I did. I fixed my problem until yesterday when I realized that the battery saving wasn't working anymore, I tried to reboot the phone, to activate every app I have desactivated and reboot again, but nothing did the trick and I don't want to factory reset my phone again and every time this happens, so I was thinking maybe someone here can help me. I'm on stock 4.4, locked, no root.

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